linux-kernel - [PATCH v3 SPI for-next 0/3] DMA Support for SPI in PCI1xxxx

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Date: Wed, 7 Feb 2024 13:36:19 +0530
From: Thangaraj Samynathan <thangaraj.s@...rochip.com>
To: <broonie@...nel.org>, <linux-spi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC: <UNGLinuxDriver@...rochip.com>, <kumaravel.thiagarajan@...rochip.com>,
	<tharunkumar.pasumarthi@...rochip.com>
Subject: [PATCH v3 SPI for-next 0/3] DMA Support for SPI in PCI1xxxx

This series of patch is to add DMA Support that improves SPI Performance
in PCI1xxxx. With DMA Support in 20MHz clock, the performance is
improved from 6Mbps to 17Mbps.

v3:
-Merged Tx and Rx DMA patches into one to avoid unidirectional dma.
-Changed naming from DMA read and write functions to from_io and to_io
to avoid confusion between DMA and SPI Controller operations.

v2:
-Added can_dma operation, so that the core can do all DMA mapping and
switch between, DMA and PIO operation by itself.
-Added error messages for syslock acquire failure and DMA init failures.

v1:
-Initial Submission

Thangaraj Samynathan (2):
  spi: mchp-pci1xxxx: Add support for DMA in SPI
  spi: mchp-pci1xxxx: DMA support for copying data to and from  SPI Buf

 drivers/spi/spi-pci1xxxx.c | 510 +++++++++++++++++++++++++++++++++++--
 1 file changed, 483 insertions(+), 27 deletions(-)

-- 
2.25.1